Redis functions are here!

Upstash Redis SDK now supports Redis Functions, allowing users to write and store custom Lua scripts directly in Redis, enabling more efficient execution by loading a function once and calling it by name rather than using EVAL each time. Redis Functions are managed server-side and persist until explicitly removed, providing a more streamlined way to handle reusable logic. The SDK introduces a new namespace, redis.functions, with methods such as load(), call(), callRo(), list(), stats(), delete(), and flush(), which facilitate function management and interaction. For functions that only read data, adding a no-writes flag improves performance by enabling execution in read-only contexts and using callRo(), which is optimized for such operations. This new approach offers a cleaner, more organized method for implementing and reusing Lua script logic within Redis.